Cannabis Nutrient Deficiencies

Cannabis Nutrient Deficiencies

Cannabis Plant Nutrient Deficiencies

Understanding the signs of nutrient deficiency is crucial when growing cannabis plants. Explore our post on the nutrients that these energizing plants require and how to identify and address nutrient deficiencies.

How to Identify Cannabis Nutrient Deficiencies

When cannabis plants don’t acquire the right nutrients, they become stressed and more vulnerable to mold, bugs, and pathogens. They also have a stunted growth rate, resulting in low yields.

The major nutrient deficiency sign you can identify in cannabis plants is leaf discoloration. Thus, determining and managing these leaf issues can help your plant thrive.

Vital Nutrients for Cannabis Plants and Symptoms of Deficiencies

A cannabis plant requires multiple essential nutrients, so be sure to check out these signs that can signal a potential deficiency:

Nitrogen Deficiency

The most general nutrient deficiency in marijuana, nitrogen, is crucial throughout the plant’s life, especially during the vegetative stage.

Here are the most common nitrogen deficiency symptoms:

  • Lightening and yellowing in mature leaves at the base of the plant.
  • Severe deficiency results in continued yellowing, brown spots, and discoloration at the leaf margins, and eventually, leaves drop and curl.
  • Decreased budding rate, early flowering, and substantially reduced yields.

Phosphorus Deficiency

Phosphorus promotes photosynthesis and the discharge of stored energy. Although this deficiency is uncommon, it may develop due to high pH levels above 7.0, and the results can be devastating for young plants and cause stunted growth, low yields, delayed flowering, and low resin production in mature plants.

The following are the common symptoms of phosphorus deficiency:

  • Purple leaf stem on old leaves, then leaves taking a blue-green shade.
  • Metallic purple and dark bronze leaves.
  • Copper-colored and dead spots on leaves.

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